Toro 74201 - Hourmeter; Purpose; How It Works; Testing

Mid-Mount Z Service Manual 7 - 29
ELECTRICAL SYSTEMS
Purpose
The hourmeter keeps track of the amount of hours the
engine has been running.
How It Works
When the ignition switch is in the “ON” position, power
is supplied to the + terminal of the hourmeter from the
“A” terminal (orange wire) of the ignition switch. When
the engine is running, oil pressure closes the oil
pressure switch supplying a ground to the - terminal of
the hourmeter.
Testing
Connect B+ to the + terminal and ground to the -
terminal, the hourmeter should run.
Hourmeter Back
Hourmeter